I needed an auto draft system for recurring billing. Or at least a way to capture and save customer credit card info so I wouldn't have to email invoices and wait for customers to pay. Revcent does it all and tons more. I'm a novice at programming and integration, but the tutorials combined with on the spot email replies to my questions made it very easy to set up. The email reply templates are just awesome. Fully editable for receipts and notifications. This system let's your biz interact with customers in a totally professional manner that you control yourself.
A+ to Revcent. Review collected by and hosted on G2.com.
Learning new software can be frustrating. Don't overthink it.
Be patient. The Knowledge Base is very helpful but like anything new, you might have to go over it a few times. Review collected by and hosted on G2.com.